Floor surfacing and polishing machine.



E. F. MURDOCK.

FLOOR SURF-AGING AND POLISHING MACHINE.

APPLICATION FILED MAILZZ, 1907.

4 SHEETS-SHBET 1.

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' WA'F/L' BY E. P. MURDOGK. FLOOR SURPAGING AND POLISHING MACHINE.

APPLICATION FILED MAB..22, 1907.

902,246. Patented Oct. 27, 1908.

V 4 SHEETSSHEET 2.

W/T/VESSES. Q VENT 0R s x/ a BY 7mm 4x45? ATTORNEY E. P. MURDOOK.

FLOOR SURFACING AND POLISHING MACHINE. APPLICATION FILED MARJZ 1907.

902,246. Patented 00127, 1908.

4 SHBETSSHEET 3.

' MIA/5885s mm ATTORNEY E. F. MURDO FLOOR SURFAOING AND PGL G MACHINE. APPLICATION FILED MAR. 22, 1907.

902,24 Patented 0ct.27,1908.

4 SHEETS-SHEBT 4.

WITNESSES.

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45 ALL/u r f ATTORNEY UNITED STATES PATENT OFFICE.

EDWIN F. MURDOOK, OF EAST ORANGE, NEW JERSEY, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO FLOOR SGRAPING MACHINE COMPANY, A CORPORATION OF NEW YORK.

FLOOR SUBFACING AND POLISHING MACHINE.

' Specification of Letters Patent.

Patented Oct. 27, 1908.

Application filed March 22, 1907. Serial No. 363,924.

To all whom it may concern: 7

Be it known that I, EDWIN F. MURoooK, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Floor Surfacing and P01- ishing Machines, of which the following is a specification.

This invention relates to improvements in floor surfacing and polishing machines.

In the drawings: Figure 1 is a plan View of a machine constructed in accordance with this invention; Fig. 2 is a side elevation of a machine constructed in accordance with this invention; Fig. 3 is a front elevation of same; Fig. 4 is a detail view of one of the surfacing rolls; Fig. 5 is a detail of the key way of the roller in open position; Fig. 6 is a detail of same in closed position.

The present invention has for its objects the improvement of the art to which it pertains; 1st, by increasing the facility of the operation of such machines and thereby increasing its capacity in the accomplishment of work; 2nd, by simplifying the construction, thereby cheapening the same and rendering it less liableto break down; and, 3rd, by rendering the operation less obnoxious by collecting and retaining the dust caused by the operation of the machine. With these objects in view the construction is as illustrated by the drawings.

The rolls A may be constructed of metal tubing, but in the present machine it is deemed best to form them from cast iron and covered with an adhesive surface such as emery cloth B. The slot -C- is cut in the surface to receive the free ends of the sand paper with which the roll is ultimately provided. The free ends of this paper are inserted in the slot Where they are bound and held by. the key D--.

In operation the paper is inserted, the first end while'the key -D- is in the position shown at Fig. 5. The key is partially rotated until the shoulder F impinges on the paper to hold this end of the paper while the body of the paper is wrapped around the roll. The remaining free end of the paper is now inserted in the slot and the key is further rotated to engage the two layers of paper to hold the same by being depth of cut.

jammed against the side. In this position the sanded surfaces of the two ends of the paper are held together and the metal of the key and side of the slot is not worn by the grit. The further rotation of the key presents the edge of the shoulder E to the paper and on being moved into position, as shown at Fig. 6 of drawings, any slack in the wrapped paper is taken up. When in position also, the shoulder -E- closes the slot C and preserves the circumferential line of the roll to avoid any jump in the operation of the roll. The key -D' is mounted suitably in bearings at the end of the recess under the slot C-, and is provided with an extension shaped to receive a wrench for turning the key, and also with a suitable device to hold the key in its position against the strain of wrapping and surfacing.

The rolls are provided with a square shaped perforation to receive snugly the square-shaped rod G-. This rod passes through square shaped perforations in the hubs H. H. which are suitably mounted in bearings I. I. in the sides -J. J of the frame of the machine. v

The two rolls are rotated in opposite directions, the pulling strain or traction on the floor being thus counter-balanced. For this purpose the rolls are provided with the pulleys K. K.- which are connected to the driving pulley of a suitable motor by means of the straight and reversed belts L. L.

In operation these rolls grind the surface of the floors on which they rest. To control the depth of the cut the machine is provided with gage plates -.\l. M. which .are fastened 0n the sides J. J. at different heights, their edges resting upon the floor and thereby controlling the depth of cut of the rolls A. A. These plates are adjustable independcntly so that on the one side the plate may be placed level with the rolls as that side rests over the surfaced portion of the floor, While the plate on the opposite side of the machine is set to allow for the original Thus in operation the whole floor is brought to the same level. It is understood that in operation it is intended that this machine will move back and forth upon the gage plates in straigl'it lines across a floor frame.

without being reversed in position. This allows the gage plate on the one side to constant-ly overhang the cut floor. The adjustment of these gage plates is regulated by the position of holes in the sides J. J.- and in the gage plates. The gage plates resting on the high wood only when the rolls have cut down to the desired depth it will be seen that at the end of the operation the entire floor will be cut to a common level. To accomplish this the machine must be propelled. For this purpose the driving mechanism is provided with the'traction spools N. N.

and O. O. and the cables P. P.

The motor -R shown in the drawings is an electric motor. This form of motor is considered most suited to this work, but some of the smaller vapor motors may be substituted. It has been explained that the driving shaft of this motor is connected to the pulleys'with which the surfacing rolls are provided for the urpose of rotating the said rolls. This sha t is also provided with a small geared pinion S with which is geared the gear-train S S S S and S The gear'wheels S and S are loosely mounted on the shaft T- and are alternately secured thereto by a clutch. This clutch operates to release the one gear prior to engaging the other. I By the interposed gear -.S, the direction of rotation of the gears S and S is reversed, and through them the rotation of the shaft T is reversed when they in turn are engaged by the said clutch.

The shaft -T is provided with two traction spools N. N. over which are run the cables --P. P. These are held in. position by any suitable guide pulleys or idlers O. O.The grasp on the cables is sufiicient to propel the machine in either direction as the shaft -T is rotated.

The machine is arrested in its action by stopping the motor R. This is effected by means of the push buttons R R which are mounted on the fronts of the These push buttons are parts of wire circuits adapted to cut in on the circuit of the magnet R on the starting box -R when either of the buttons R R iscompressed to close its circuit the magnet R is cut out and deenergized. The starting handle is thus released and swings back to shut ed the electricity from the motor.

By placing the buttons R in the positions shown they strike against the side wall when the machine reaches the end of its travel across the room. This insures against the machine standing in this position grinding the floor and using current uselessly.

In operation the cables P. P.- are stretched across the room and secured at or near the base-board by any suitable method.

The cables are to be shifted when the machines are shifted. .The cables are wound on spools or reels whereby the length of cable may be changed at any moment without splicing or coupling. These spools or reels may be carried on the anchor brackets or be separate therefrom.

While I have herein described the construction and operation of this machine as applicable to two rolls, the invention is not so limited. The machine could be constructed with a single roller having the gage plates extended to both sides of the vertical center line or lines of cutting. These gage plates would rest on the high wood as above described and thereby serve the same purpose as in the double rolls described. The

- generic purpose of these gages is to permit the machine to pass directly across the boards of the floor without following the waves of the same. For this purpose I prefer that the gages should be long enough to extend over at least two full boards; or so that they will rest on at least two high spots at all times while cutting the floor to a common level. Also while I have described only such rolls as are provided with sand paper, I do not wish to be understood as limiting myself to such form of roll as I contemplate the use of rolls composed of circular saws.

Having thus described thls invention 1t is claimed to rotate the said rolls in opposite direc-.

tions; adjustable devices adapted to be raised and lowered from the floor to regulate the depth of cutting of the said rolls, substantially as described.

2. In a portable floor surfacing machine the combination of a driving mechanism mounted on a suitable frame; two parallel abrasive rolls mounted in said frame to support and carry the full weight of said frame and any weights added thereon; power transmitting devices whereby the driving mechanism and rolls are connected to rotate the said rolls in opposite directions; adjustable gages having straight surfaces next the floor on which the machine is moved, extended between the lines of cutting of the said rolls, to maintain the level of operation, substantially as described.

3. In a portable floor surfacing machine the combination of a driving mechanism mounted on a suitable frame; an abrasive roll connected to the said driving mechanff maintain the level of operation, substanism; adjustable gages having straight surfaces next the floor on Whiohthe macihine i? moved extended from the cutting ine 0 the roll in either and both directions to] v U Q Witnesses: tially as described. JOHN B. HIoKs,

In testimony whereof I have signed my I WILLIAM A. WALLING.

name to this specification in the presence of two SIJbSCI'lblIlg Witnesses. 

